212120222021 has 8 divisors (see below), whose sum is σ = 215308612704. Its totient is φ = 208932490800.

The previous prime is 212120222003. The next prime is 212120222071. The reversal of 212120222021 is 120222021212.

It is a happy number.

212120222021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212120222021 - 2¹⁴ = 212120205637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120222071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503486 + ... + 823248.

It is an arithmetic number, because the mean of its divisors is an integer number (26913576588).

Almost surely, 2^212120222021 is an apocalyptic number.

It is an amenable number.

212120222021 is a deficient number, since it is larger than the sum of its proper divisors (3188390683).

212120222021 is an equidigital number, since it uses as much as digits as its factorization.

212120222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329731.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212120222021 its reverse (120222021212), we get a palindrome (332342243233).

The spelling of 212120222021 in words is "two hundred twelve billion, one hundred twenty million, two hundred twenty-two thousand, twenty-one".